TY - JOUR
T1 - Development of state diagram of bovine gelatin by measuring thermal characteristics using differential scanning calorimetry (DSC) and cooling curve method
AU - Rahman, Mohammad Shafiur
AU - Al-Saidi, Ghalib
AU - Guizani, Nejib
AU - Abdullah, Aminah
N1 - Funding Information:
The authors would like to acknowledge the support of Sultan Qaboos University towards this research in developing fish skin gelatin.
PY - 2010/9/20
Y1 - 2010/9/20
N2 - A state diagram of bovine gelatin was developed by measuring the freezing curve, glass transition, unfolding, solids-melting lines, and ultimate maximum-freeze-concentration conditions. The freezing point decreased with the increase of solids; whereas glass transition, unfolding, and solids-melting decreased with the decrease of solids up to solids content 0.84 g/g gelatin and then remained constant. The freezing point, glass transition and solids-melting were modeled by Chen's model based on the Clausius-Clapeyron equation, modified Gordon-Taylor model, and Flory's equation, respectively. The ultimate maximum-freeze-concentration conditions were found as (T′m)u equal to -11.9 °C and (T‴g)u equal to -14.9 °C, and the characteristic solids content, X′s as 0.80 g/g sample (i.e. un-freezable water, X′w = 0.20), respectively. Similarly the value of Tgiv (i.e. intersection of vertical line passing through T′m and glass transition line) was estimated as 34 °C.
AB - A state diagram of bovine gelatin was developed by measuring the freezing curve, glass transition, unfolding, solids-melting lines, and ultimate maximum-freeze-concentration conditions. The freezing point decreased with the increase of solids; whereas glass transition, unfolding, and solids-melting decreased with the decrease of solids up to solids content 0.84 g/g gelatin and then remained constant. The freezing point, glass transition and solids-melting were modeled by Chen's model based on the Clausius-Clapeyron equation, modified Gordon-Taylor model, and Flory's equation, respectively. The ultimate maximum-freeze-concentration conditions were found as (T′m)u equal to -11.9 °C and (T‴g)u equal to -14.9 °C, and the characteristic solids content, X′s as 0.80 g/g sample (i.e. un-freezable water, X′w = 0.20), respectively. Similarly the value of Tgiv (i.e. intersection of vertical line passing through T′m and glass transition line) was estimated as 34 °C.
KW - Freezing point
KW - Glass transition
KW - Maximal-freeze-concentration condition
KW - Solids-melting temperature
KW - Un-freezable water
KW - Unfolding temperature
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U2 - 10.1016/j.tca.2010.06.011
DO - 10.1016/j.tca.2010.06.011
M3 - Article
AN - SCOPUS:77956191103
SN - 0040-6031
VL - 509
SP - 111
EP - 119
JO - Thermochimica Acta
JF - Thermochimica Acta
IS - 1-2
ER -